Support for 10GBase-T RJ45 SFP+ transceivers in modern switches can be a hit and miss. What is the technical limitation as to why some switches don't support them? So far my understanding on the issue is that it takes a lot of compute power for the transceiver to do this translation. Computer power usually equates with more power hungry transceivers and more heat dissipation which could explain the limitations as the transceivers may be breaching the SFP+ power requirements or thermal envelope.
Having said that while support for 10GBase-T RJ45 SFP+ transceivers is limited in switches most of them do support 10GBase-T RJ45 DAC cables which in effect do a similar translation to copper so I am confused as to why DAC cables are supported while RJ45 SFP+ transceivers are not.
Finally while switch manufacturers claim they do not support 10GBase-T RJ45 SFP+ transceivers in their switches we have seen over the last few years how new third party transceiver modules have appeared that seem to work perfectly. Are these safe to use? My educated guess around this is that it seems that these suppliers managed to pack enough compute power in these newer transceivers using newer silicon process nodes which provide more compute, are less power hungry and therefore dissipate less heat. Am I in the right track here?